monde (1) mesure (méthode analytique) (1) matériau (1) littérature (1) protection de l'environnement (1) coût (1) Variation (1) Individual differences (1) Will (1) Performance (1) Measurement (1) Human beings (1) Literature (1) Kindness (1) Environmental protection (1) Cost (1) Cooperation (1) Benevolence (1) Attention (1) Animals (1) Location (1) Regions (1) Will (1) Developed countries (1) Performance (1)